Statistically speaking, long term investing is a profitable endeavour. But no-one is immune from buying too high. To wit, the Insigma Technology Co., Ltd. (SHSE:600797) share price managed to fall 52% over five long years. That's an unpleasant experience for long term holders. And it's not just long term holders hurting, because the stock is down 38% in the last year. Shareholders have had an even rougher run lately, with the share price down 20% in the last 90 days.

With the stock having lost 7.4% in the past week, it's worth taking a look at business performance and seeing if there's any red flags.

While markets are a powerful pricing mechanism, share prices reflect investor sentiment, not just underlying business performance. One way to examine how market sentiment has changed over time is to look at the interaction between a company's share price and its earnings per share (EPS).

During the five years over which the share price declined, Insigma Technology's earnings per share (EPS) dropped by 16% each year. Notably, the share price has fallen at 14% per year, fairly close to the change in the EPS. This suggests that market participants have not changed their view of the company all that much. So it's fair to say the share price has been responding to changes in EPS.

The image below shows how EPS has tracked over time (if you click on the image you can see greater detail).

Before buying or selling a stock, we always recommend a close examination of historic growth trends, available here.

A Different Perspective

We regret to report that Insigma Technology shareholders are down 37% for the year (even including dividends). Unfortunately, that's worse than the broader market decline of 12%. However, it could simply be that the share price has been impacted by broader market jitters. It might be worth keeping an eye on the fundamentals, in case there's a good opportunity. Unfortunately, last year's performance may indicate unresolved challenges, given that it was worse than the annualised loss of 9% over the last half decade. We realise that Baron Rothschild has said investors should "buy when there is blood on the streets", but we caution that investors should first be sure they are buying a high quality business. I find it very interesting to look at share price over the long term as a proxy for business performance. But to truly gain insight, we need to consider other information, too. For instance, we've identified 3 warning signs for Insigma Technology (1 is potentially serious) that you should be aware of.

For those who like to find winning investments this free list of undervalued companies with recent insider purchasing, could be just the ticket.

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on Chinese exchanges.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.